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參數(shù)資料
| 型號(hào)： | KS0108B |
| 廠商： | SAMSUNG SEMICONDUCTOR CO. LTD. |
| 英文描述： | Dot matrix LCD Driver(點(diǎn)陣LCD的驅(qū)動(dòng)器) |
| 中文描述： | 點(diǎn)陣LCD驅(qū)動(dòng)器（點(diǎn)陣液晶顯示的驅(qū)動(dòng)器） |
| 文件頁數(shù)： | 16/26頁 |
| 文件大小： | 227K |
| 代理商： | KS0108B |
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KS0108B 64CH SEGMENT DRIVER FOR DOT MATRIX LCD
OPERATING PRINCIPLES & METHODS
1. I/O Buffer
Input buffer controls the status between the enable and disable of chip. Unless the CS1B to CS3 is in active mode, Input or
output of data and instruction does not execute. Therefore internal state is not change. But RSTB and ADC can operate
regardless CS1B-CS3.
2. Input register
Input register is provided to interface with MPU which is different operating frequency. Input register stores the data tempor-
arily before writing it into display RAM.
When CS1B to CS3 are in the active mode, R/W and RS select the input register. The data from MPU is written into input
register. Then Writing it into display RAM. Data latched for falling of the E signal and write automatically into the display data
RAM by internal operation.
3. Output register
Output register stores the data temporarily from display data RAM when CS1B, CS2B and CS3 are in active mode and R/W and
RS=H, stored data in display data RAM is latched in output register. When CS1B to CS3 is in active mode and R/W=H, RS=L,
status data (busy check) can read out.
To read the contents of display data RAM, twice access of read instruction is needed. In first access, data in display data RAM
is latched into output register. In second access, MPU can read data which is latched. That is, to read the data in display data
RAM, it needs dummy read. But status read is not needed dummy read.
RS
L
R/W
L
H
L
H
Function
Instruction
Status read (busy check)
H
Data write (from input register to display data RAM)
Data read (from display data RAM to output register)
4. Reset
The system can be initialized by setting RSTB terminal at low level when turning power on, receiving instruction from MPU.
When RSTB becomes low, following procedure is occurred.
1. Display off
2. Display start line register become set by 0.(Z-address 0)
While RSTB is low, No instruction except status read can be accepted. Therefore, execute other instructions after making
sure that DB4=0 (clear RSTB) and DB7=0 (ready) by status read instruction.
The Conditions of power supply at initial power up are shown in table 1.
Table 1. Power Supply Initial Conditions
Item
Reset Time
Rise Time
Symbol
t
RS
t
R
Min
1.0
-
Typ
-
-
Max
-
200
Unit
us
ns
4.5[V]
t
RS
t
R
0.7V
DD
0.3V
DD
V
DD
RSTB
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